Cleaner silencer assembly



Sept 22, 1959 J. D. McMxcHAEL CLEANER SILENCER ASSEMBLY Filed Oct. 29, 1956 INVENTOR TTQNEK 2,905,268 j CLEANER SILENCER ASSEMBLY l Application oct-ober 29, 1956, serial No. 613,843, 2 Claims. (Cl. 18s-44) This invention relates to cleaner silencer assemblies for automotive and other uses and has particular relation to cleaner silencer.assembliesespecially applicable for use with V-type engines employed in modern passenger automobiles where space is at a premium, Where cost mustbe` low and where eiciency of operation. must be great. f

It is proposed'to provide a cleaner silencer assembly which will meet these requirements as will herein-after become apparent.

In the drawing:

Figure 1 is a cross section view of a cleaner silencer assembly embodying the' principles `of the invention.

Figure' 2 is a fragmentary cross sectional vview taken substantially in the plane of line 2-2 of Figure 1.

Figure 3 is -a vertical sectional view through a modified form of the cleaner silencer assembly illustrated by Fig ures 1 and 2.

The cleaner silencer assembly y10, as illustrated by Figures 1 and 2, is formed to provide a supporting Wall 11 in which an annular filter chamber 12 is formed out-- wardly of a centrally disposed outlet 13. The wall 11 may be formed, if desired, by' providing annular wall sections 14 and l16 secured together at 17. The iilter chamber 12 and the outlet 13 open through the wall 11 in opposite directions. An inletehamber 18 is formed outwardly of the iilter chamber 12 by a Wall 19 surrounding the outer part of .the wall 11. The inlet chamber 18 communicates with the filter chamber 12 around the beaded edge 21 of the wall 11. The beaded edge 22 of the wall 19 is adapted to be engaged by a gasket 23 formed in a channel 24 extending around the outer edge of a cover 26 which extends over the lter chamber 12 and the outlet `13. The opposite edge of the wall 19 may be secured to the wall 11 outwardly of the filter chamber 12 by a lap seam indicated at 27. Outwardly of the inlet chamber 18 is an inlet passage 28 which is formed by a wall 29 extending around the wall 19 and secured thereto at one edge as -is indicated at 31. The opposite edge of the wall 29 may be formed to provide a bead 32 engaging the outer peripheral edge of an annular lower wall 33. The lower wall 33 forms a part of the outer wall 29 'of the inlet passage 28 and a part of the wall 19 which engages the wall 1'1 at 27. The outer part of the wall 19 may be secured to an intermediate part of the wall 3'3 by a seam indicated at 34. The inlet passage 28 may be supplied with air at one side of the assembly by a. conduit or tube 36 forming an inlet 35 extending outwardly from the assembly 10. The tube or conduit may be secured in an opening in the wall 29 by llange means indicated at 3T.

The inlet passage `28 is an annular passage which extends in opposite directions around the wall 19 from the inlet 3S. Directly opposite the inlet 35 the wall 119 may be provided with openings 38 and 39 which provide communication between the part of the inlet passage opposite the inlet l35 and the inlet chamber 18. It Will be noted from Figure 1 that the part of the inlet Sill ice

chamber 18 which communcates with the openings B8 and 39 is wider than the part of the inlet adjacent the inlet to provide a uniform distribution of air from the inlet chamber 18 to the lilter chamber 12. A partition wall 41 is formed across the inlet passage 28 between the openings 38 and 39 to direct the air from the different branches of the passage 28 inwardly through the openings 38 and 39. The iilter means 42 is disposed in the inlet chamber 12 between the inlet passage '18 and the outlet 13 for filtering the air supplied to the chamber y12. The ilter means 42 may be secured between the cover 12 and the supporting Wall |11 in any suitable manner. As shown by Figure 1 the tilter means 42 is secured between annular abutment means I43 and 44 formed on baille Walls -46 and 447, respectively. The baille wall 46 may be secured to the central part of the cover 26 in any suitable manner. The baille wall 47 is adapted to .be secured Ito and supported by the wall 111 at the outer peripheral edge thereof as is indicated at 49. The parts of the baille walls 46 and 47 disposed outwardly of the abutment means 43 and 44 supporting the lilter means 42 may be spaced uniformly from one another to provide a filter inlet 51 for equally distributing the air in the filter chamber 12 to Ithe iilter means 42. Beyond the abutment means 44 the baille wall 47 extends downwardly at -52 and toward the outlet 13 to provide an outlet passage y53 extending toward the outlet 13. The part of the baille walls 46 and beyond the lter means 42 are spaced .to provide an outlet chamber 54 leading to the outlet passage 53 and the outlet 13. Abutment means also is formed within the outlet chamber 42 by spacers 56 that are struck out from openings in the baille wall `46 and that extend across the outlet chamber .54 to engage the baille wall 47 adjacent the outlet 53. The cover 26 is held in position on .the bead 22 in any suitable manner as by fastening means 57 in the form of a bolt 58 and a wing nut 59. The bolt may be secured in the carburetor or other intake device of the engine with which the cleaner silencer assembly 110 may be employed. inwardly of the seam 49 rthe baille 47 is spaced from the wall 11 to provide a resonating chamber 61 which is acoustically coupled to the outlet 13 by an annular opening 62 formed between the end of the tubular extension 52 of the wall 47 and opening in the wall 11 in which the outlet 13 is formed. Also formed within the outlet chamber 54 and extending concentrically within the tubular extension 52 is cylindrical wall means 63 projecting from the cover 26 and forming a resonating chamber 64 which is acoustically coupled to the outlet 13 by openings 66. Certain sound waves emanating from the engine and into the outlet `13 will be attenuated in the resonating chambers 61 and 64. The sound waves not so attenuated will be effected by the impedance of the relatively constricted passage formed by the outlet 53 around the wall means 63, by the relatively shallow distribution chamber 54, by the ibrous structure of the filter means 42 and by .the iilter inlet 51. Thereafter sound waves will be further attenuated by the capacitance of the iilter chamber 12 outwardly of the inlet 51 and the inlet chamber 18 and by the impedance of the two branches of the inlet passage 28 and the inlet 35.

The cleaner silencer assembly disclosed by Figure 3 is similar to that disclosed by Figures l and 2 except for variations involved in the use of oil bath type filter means indicated at 71. The parts of the Figure 3 structure that are the same as those in the lFigure 1 structure are indicated by the same reference numerals. In the Figure 3 structure the baffle lwall 72 which corresponds to the baille Wall 47 in Figure 1 is made in two parts indicated at 73 and 74 which are secured together at the seam indicated at 76. The part 74 forms the inside wall for the l-ter means 71. The lower ilanged edge of the part lPatented Sept. 22, 1959v 3 74 is secured by a seam 76 to the adjacent edge of the oil control baile 77Y and the perforated lower wall 78 of the lter means 71. The outer side wall 79 of the filter means .'71tislsecuredinthepliannel 24 Yof the cofver 26 inwardly `of the gaslet means 2,3, The spacing and the abutment means 81 vis formed at `theoutfer end of wall means 82 whih is .similiar t0 the haiti@ f1.6 eltibodied in the Fleur@ .1 .Stwturs- The abutment .0r spacer means 81 engages the wall 7 2 at the seam76 securesthe yfilter means 7.1 in position lupon vthe wall 11 when4 the lfastening means 58is, engaged.v A gasket 83 may be employed between; the `Walls72 -`and .11 yat the seam 7:6.

,Theoperation `of the structure disclosed by Figure 3 is similarto theoperation of the Figure l ystrugr;1: ur'e''as prieviously described.

I Claim.:

1. A cleaner silencer ,assembly-comprising a supporting ,wall having ,an inner partrand anout'er part, `said outer part forming ,van annular filter` chamber vin one nside of. said supportin'gwall, s aid inner. partforming anoutlet leading .,fr'om` said l,annular filter lchamber through the central part ofvsaid supporting wall, an ,v annularflower wall securedto theguter part of ,saidsupp'orting'wall and having parts extending downwardlyandloutwardly from the lower part ofsaidsltervchamber, an annular intermediate Wall disposed outwardly lof, said *filter chamber/and being secured `to .said outwardly 4extending part of said lower wall to provide an inlet chamber cornmunicating withsaid lfilter chamber around theuppcr edge of said outer part ofsaid supporting wall, an-ulnular Aouter wallsecured at the opposite edges thereofuto the outer extremity of said lower wall and to the upper extremity of said intermediate walland providing inlet passage means around said inlet chamber, inlet conduit means secured to one side of said outer wall and communicating with said inlet passage means, and inlet Opern ing means in said intermediate wall and on the side thereof opposite said inlet conduit means and providing communication between said inlet passage means and said inlet ciiainber means', annular l't'er"means in said ilter chamber, and a'cover for. said inletohanber and said annular ltermeans, said cover being adaptedpto extend across said lter chamber and said inlet V'chan'rber between the edges of Asaid upper extremity of said intermedifewanofsid as'seibly 2. A cleaner silencer assembly as defined by claim l and in which said inlet chamber varies in width across said assembly from a wider part adjacent said inlet opening means vto, a narrower part adjacent said inlet conduit means.

vReferences Cited in the tile of this patent UNITED STATES PATENTS 2,789,662 McMullen Apr. 23, 1957 2,822,5485 senor et a1 s Feb. 11 1958 Y FOREIGN PATENTS 725,363 Great Britain Mar. 2, 1955 756,640 Great Britain Q Sept. 5, 1956 1,109,454 France Sept. 28, 19.55 869,710 .Germany Mgr. 5,1953 

